我已经多次阅读了谷歌关于消息传递的文档，并且可能已经查看了10多个同样问题的其他问题，并且已经尝试了大部分解决方案的几个变体以及我有下面...这是黑魔法，对吧？
清单文件：
{ manifest_version：2，name：Message Test，version：1.0， browser_action：{default_popup：popup.html}， background：{scripts：[background.js] } ， content_scripts：[ {matches：[< all_urls>]，js：[message-test。 js] } ] }我知道扩展不假设使用内联JS，但我离开这个，所以原来的问题可以留下来，因为我仍然无法从背景页面发送消息，当我从弹出到后台，我从manifest.json中删除了相应的行
popup.html文件：
< HTML> < head> < script> chrome.tabs.query（{active：true，currentWindow：true}，function（tabs）{ chrome.tabs.sendMessage（tabs [0] .id，{greeting：hello，theMessage ：为什么不能这样工作？}，function（response）{ console.log（response.farewell）; }）; }）; < / script> < / head> < body> < / body> < / html>OR
background.js文件：
chrome.tabs.query（{active：true，currentWindow：true}，function（tabs）{ chrome .tabs.sendMessage（tabs [0] .id，{greeting：hello，theMessage：为什么没有这个工作？），function（response）{ console.log（response.farewell ）; }）; }）;message-test.js file：
var Mymessage; chrome.runtime.onMessage.addListener（function（message，sender，sendResponse）{ if（message.greeting ==hello）{ Mymessage = message.theMessage; alert（Mymessage）; } else { sendResponse（{}）; } }）;我得到一个未定义的警报...
我也试图在按下弹出式窗口中的按钮并在指定的URL上有一个窗口后执行此操作，但这是后面的问题。除了在addEventListener（click....： pastebin/KhqxLx5y AND http：// pastebin/JaGcp6tj
解决方案您的代码有几个问题。
Chrome不允许在扩展程序中使用内嵌脚本，您必须将popup.html划分为脚本+ HTML： $ b
// popup.html < html> < body> < script type =text / javascriptsrc =popup。 js>< / script> < / body> < / html> // popup.js chrome.tabs.query {active：true，currentWindow：true}，function（tabs）{ var tab = tabs [0]; //不要忘记声明tab变量 chrome.tabs.sendMessage（tab。 ID，{问候ing：你能听到我吗？}，function（response）{}）; }）;
I've already read the documentation from Google on 'message passing' a few times and have probably looked at over 10 other questions with the same problem and already tried quiet a few variations of most of their "solutions" and of what I have below... This is black magic, right? Either way, here it goes.
Manifest File:
{ "manifest_version" : 2, "name" : "Message Test", "version" : "1.0", "browser_action": { "default_popup": "popup.html" }, "background": { "scripts": ["background.js"] }, "content_scripts": [ { "matches" : ["<all_urls>"], "js": ["message-test.js"] } ] }I'm aware extensions aren't suppose to use inline JS, but I'm leaving this in so the original question can be left as it was since I still can't get the message to send from the background page, When I switch from the popup to the background, I removed the appropriate lines from the manifest.json
popup.html file:
<html> <head> <script> chrome.tabs.query({active: true, currentWindow: true}, function(tabs) { chrome.tabs.sendMessage(tabs[0].id, {greeting: "hello", theMessage: "Why isn\'t this working?"}, function(response) { console.log(response.farewell); }); }); </script> </head> <body> </body> </html>OR
background.js file:
chrome.tabs.query({active: true, currentWindow: true}, function(tabs) { chrome.tabs.sendMessage(tabs[0].id, {greeting: "hello", theMessage: "Why isn\'t this working?"}, function(response) { console.log(response.farewell); }); });message-test.js file:
var Mymessage; chrome.runtime.onMessage.addListener(function(message, sender, sendResponse) { if (message.greeting == "hello"){ Mymessage = message.theMessage; alert(Mymessage); } else{ sendResponse({}); } });I get an undefined alert...
I'm also trying to execute this after pressing a button from a popup and having a window at a specified url, but that's a later issue. The other files for the button and window can be found here except with the background.js content wrapped in an addEventListener("click"....: pastebin/KhqxLx5y AND pastebin/JaGcp6tj
解决方案There are several issues in your code.
Chrome doesn't allow inline scripts in extensions. You must divide your popup.html to script + HTML:
// popup.html <html> <body> <script type="text/javascript" src="popup.js"></script> </body> </html> // popup.js chrome.tabs.query({active: true, currentWindow: true}, function(tabs) { var tab = tabs[0]; // do not forget to declare "tab" variable chrome.tabs.sendMessage(tab.id, { greeting: "Can you hear me?" }, function(response){}); });
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